Titanium alloy hydride deformation behavior research method

Abstract

According to the technical scheme, the titanium alloy hydride deformation behavior research method is characterized by comprising the following steps that a, low-temperature speckle preparation is conducted, specifically, silver film speckles are prepared on the surface of a titanium alloy hydride sample, specifically, a silver layer with the thickness of 3-5 nm is deposited at the room temperature through a direct-current magnetron sputtering method, then the titanium alloy hydride sample is soaked in a NaCl solution with the concentration of 1-2 g / L for 1-3 h, and then the titanium alloy hydride sample is subjected to low-temperature speckle preparation; nano-scale speckles with the average size of 40-60 nm are formed; b, carrying out HR-DIC image acquisition; c, carrying out EBSD crystallography characterization; and d, multi-data coupling analysis. According to the method, the breakthrough of a speckle preparation technology is realized, nano-scale speckle preparation at room temperature is realized for the first time, the problem of hydride temperature sensitivity is solved, the speckle resolution reaches 40nm, and the phase interface deformation analysis requirement is met; the EBSD calibration efficiency is improved, the calibration rate of the small-size hydride is improved from 65% to 92% through the spherical index algorithm, and the crystal structure is truly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of research on microscopic deformation behavior of metal materials, and in particular to a method for researching deformation behavior of titanium alloy hydride. Background Art

[0002] Titanium alloys are widely used in aerospace, nuclear power, and other fields due to their excellent specific strength and corrosion resistance. However, the hydrides formed by hydrogen atom penetration significantly affect the mechanical properties of the material, and its deformation behavior is closely related to the crystallographic orientation and phase interface bonding characteristics. Existing research faces the following technical bottlenecks:

[0003] 1. Technical limitations of observing hydride deformation behavior

[0004] Traditional deformation analysis technology is difficult to meet the requirements of hydride microscale (below micron level) deformation characterization:

[0005] Failure of speckle preparation process: Hydride is sensitive to temperature (easily decomposed at >200°C). Conventional gold film thermal evaporation speckle preparation process (requires temperatures above 300°C) will destroy the hydride morphology. Furthermore, the resolution of spray-applied speckle patterns (such as matte paint) at room temperature is insufficient (spot size >1μm), making it impossible to capture the nanoscale strain gradient at the hydride-substrate interface.

[0006] Lack of multi-scale data coupling: Although EBSD can characterize the crystallographic orientation of hydrides, it cannot correlate with the local deformation field in real time; HR-DIC can obtain high-resolution strain distribution, but lacks crystallographic information of the phase interface. The independent testing of the two leads to a break in the "orientation-deformation" correlation analysis.

[0007] 2. Hydride EBSD calibration efficiency is low

[0008] Hydride sizes are typically less than 5μm, and their contrast with the titanium matrix is ​​minimal. Conventional EBSD rectangular grid scanning is prone to misses, and the blurred Kikuchi bands lead to high calibration noise (error rate >30%). Existing cleanup algorithms improve calibration efficiency by removing low-confidence data, but this also filters out critical small-sized hydride information, making it impossible to truly restore the crystal structure.

[0009] 3. Lack of quantitative analysis of strain localization

[0010] The difference in elastic modulus between the hydride and the matrix (about 180 GPa vs. 115 GPa for the titanium matrix) leads to significant strain concentration near the phase interface, but existing technologies lack quantitative characterization of the following key parameters:

[0011] The influence of different crystallographic orientations of hydrides (e.g. <10-10> orientation of α-Ti hydride) on the activation of slip systems;

[0012] Quantitative relationship between the phase interface angle (the orientation difference between hydride and matrix) and the degree of strain localization; noise suppression method for nanoscale speckle (<50nm) in high-resolution strain images.

[0013] Existing technology is insufficient

[0014] In summary, existing methods cannot achieve cross-scale coupling analysis of "crystallographic orientation-local deformation field-phase interface behavior" while maintaining the original morphology of hydrides. It is urgent to develop a low-temperature speckle preparation process suitable for temperature-sensitive materials, a highly robust EBSD calibration method and multimodal data fusion technology. Summary of the Invention

[0015] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a method for studying the deformation behavior of titanium alloy hydrides to solve the problems existing in the prior art.

[0016] The above technical objectives of the present invention are achieved through the following technical solutions:

[0017] A method for studying the deformation behavior of titanium alloy hydride comprises the following steps:

[0018] a. Low-temperature speckle pattern preparation: Silver film speckle patterns were prepared on the surface of titanium alloy hydride samples by using DC magnetron sputtering to deposit a 3-5 nm thick silver layer at room temperature. The sample was then immersed in a 1-2 g / L NaCl solution for 1-3 hours to form nanoscale speckles with an average size of 40-60 nm.

[0019] b. HR-DIC image acquisition: An environmental scanning electron microscope (ESEM) was used to acquire image arrays before and after deformation. Operating parameters were: accelerating voltage 5-10 kV, beam current 0.1-0.3 nA, working distance 5-8 mm, dwell time 1-3 ms, and an annular backscattered electron detector. Image arrays ranging from 9 × 9 to 15 × 15 were acquired with 10%-20% overlap. Single image resolution was ≥3072 × 2048, with a pixel size ≤10 nm.

[0020] c. EBSD crystallographic characterization: Before speckle pattern preparation, EBSD scanning was performed on the target area. The raw data was processed using the spherical indexing algorithm. The scanning parameters were: accelerating voltage 15-25 kV, beam current 20-30 nA, step size 100-300 nm. The hydride phase distribution map and crystallographic orientation data were output using OIM analysis software.

[0021] d. Multi-data coupling analysis: The local strain field (εxx, εyy, γxy) calculated by HR-DIC is spatially aligned with the EBSD phase distribution and crystallographic orientation data to establish a quantitative correlation model between hydride morphology, orientation and local deformation.

[0022] Preferably, the silver film deposition current in step a is 30-50 mA, and the sputtering time is 5-10 min, ensuring that the uniformity error of the silver layer is less than 5%.

[0023] Preferably, the image stitching in step b is performed using the Grid / CollectionStitching plug-in of ImageJ software, and the edges of the stitched images are cropped to retain an effective analysis area ≥ 100 μm × 100 μm.

[0024] Preferably, the spherical index algorithm in step c is implemented by the following steps:

[0025] The original Kikuchi strip image was preprocessed with Gaussian blur (σ = 1.5-2.0 pixels);

[0026] A three-dimensional spherical coordinate system is used for crystal orientation search, and the search angle range is ±15°;

[0027] The minimum confidence threshold is set to 0.15, and low-quality calibration data are rejected without subsequent cleanup processing.

[0028] Preferably, the spatial registration error in step d is ≤ 2 pixels, and coordinate calibration is achieved by marking tungsten wire positioning points with a diameter of 5-10 μm on the sample surface.

[0029] Preferably, the method further includes a deformation loading step: using an in-situ stretching stage to load in a scanning electron microscope, and controlling the strain rate to be 1×10 -4 -1×10 -3 / s, and the loading was paused and images were collected every time the macrostrain increased by 0.2%-0.5%.

[0030] Preferably, the hydride sample is prepared by electrochemical hydrogenation, the electrolyte is 1 / 3 volume phosphoric acid + 2 / 3 volume glycerol, and the current density is 20-60 mA / cm 2 , hydrogen charging time is 6-12h, followed by annealing at 150-200℃ for 1-2h to uniform hydride distribution.

[0031] Preferably, the target material of the DC magnetron sputtering apparatus is pure silver (purity ≥ 99.99%), and the vacuum degree of the sputtering chamber is maintained at 1×10 -3 Below Pa.

[0032] Preferably, the displacement resolution of the in-situ stretching stage is ≤10 nm, and the accuracy of the force sensor is ≤0.1 mN, supporting high-precision deformation control in a scanning electron microscope.

[0033] A dedicated system for implementing the above-described method is characterized by comprising: a. a low-temperature speckle pattern preparation module: comprising a DC magnetron sputtering apparatus (current 0-100 mA) and a constant-temperature water bath immersion tank (temperature control accuracy ±1°C); b. a multimodal imaging module: comprising an integrated environmental scanning electron microscope (equipped with an EBSD detector and an in-situ stretching stage) and HR-DIC image acquisition software (supporting automatic array scanning); c. a data coupling analysis module: comprising an ImageJ image stitching plug-in, OIM data analysis software, and an independently developed HR-DIC-EBSD registration algorithm library.

[0034] In summary, the present invention mainly has the following beneficial effects:

[0035] This invention achieves a breakthrough in speckle pattern preparation technology: for the first time, nanoscale speckle pattern preparation is achieved at room temperature, solving the temperature sensitivity problem of hydrides. The speckle resolution reaches 40nm, meeting the requirements of phase interface deformation analysis.

[0036] The present invention uses EBSD calibration efficiency to improve: the spherical index algorithm increases the calibration rate of small-sized hydrides from 65% to 92%, and truly restores the crystal structure;

[0037] The present invention realizes cross-scale coupling analysis: achieving precise alignment of 8nm strain resolution and 200nm orientation resolution, revealing the quantitative relationship between hydride orientation and strain localization, and providing key data for the study of hydrogen embrittlement mechanism.

[0038] The silver film speckle preparation process, spherical index calibration method and multimodal coupling system adopted in the present invention are disclosed for the first time, which are different from traditional gold film speckle and rectangular index technologies; the present invention proposes a systematic solution to the temperature sensitivity and small-size calibration problems of hydrides, significantly improving the analysis accuracy; the present invention has been verified by actual samples and can be directly applied to the study of the hydrogen embrittlement mechanism of titanium alloys, with clear engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example 1

[0042] refer to Figure 1 , a method for studying the deformation behavior of titanium alloy hydride, comprising the following steps:

[0043] a. Low-temperature speckle pattern preparation: Silver film speckle patterns were prepared on the surface of titanium alloy hydride samples by using DC magnetron sputtering to deposit a 3-5 nm thick silver layer at room temperature. The sample was then immersed in a 1-2 g / L NaCl solution for 1-3 hours to form nanoscale speckles with an average size of 40-60 nm.

[0044] b. HR-DIC image acquisition: An environmental scanning electron microscope (ESEM) was used to acquire image arrays before and after deformation. Operating parameters were: accelerating voltage 5-10 kV, beam current 0.1-0.3 nA, working distance 5-8 mm, dwell time 1-3 ms, and an annular backscattered electron detector. Image arrays ranging from 9 × 9 to 15 × 15 were acquired with 10%-20% overlap. Single image resolution was ≥3072 × 2048, with a pixel size ≤10 nm.

[0045] c. EBSD crystallographic characterization: Before speckle pattern preparation, EBSD scanning was performed on the target area. The raw data was processed using the spherical indexing algorithm. The scanning parameters were: accelerating voltage 15-25 kV, beam current 20-30 nA, step size 100-300 nm. The hydride phase distribution map and crystallographic orientation data were output using OIM analysis software.

[0046] d. Multi-data coupling analysis: The local strain field (εxx, εyy, γxy) calculated by HR-DIC is spatially aligned with the EBSD phase distribution and crystallographic orientation data to establish a quantitative correlation model between hydride morphology, orientation and local deformation.

[0047] Wherein, the silver film deposition current in step a is 30-50 mA, the sputtering time is 5-10 min, and the uniformity error of the silver layer is ensured to be less than 5%.

[0048] The image stitching in step b was performed using the Grid / CollectionStitching plug-in of ImageJ software, and the edges of the stitched images were cropped to retain an effective analysis area ≥ 100 μm × 100 μm.

[0049] The spherical index algorithm in step c is implemented by the following steps:

[0050] The original Kikuchi strip image was preprocessed with Gaussian blur (σ = 1.5-2.0 pixels);

[0051] A three-dimensional spherical coordinate system is used for crystal orientation search, and the search angle range is ±15°;

[0052] The minimum confidence threshold is set to 0.15, and low-quality calibration data are rejected without subsequent cleanup processing.

[0053] The spatial registration error in step d is ≤ 2 pixels, and coordinate calibration is achieved by marking tungsten wire positioning points with a diameter of 5-10 μm on the sample surface.

[0054] The deformation loading step is also included: the in-situ tensile stage is used to load the sample in the scanning electron microscope, and the strain rate is controlled at 1×10 -4 -1×10 -3 / s, and the loading was paused and images were collected every time the macrostrain increased by 0.2%-0.5%.

[0055] The hydride sample was prepared by electrochemical hydrogenation, the electrolyte was 1 / 3 volume phosphoric acid + 2 / 3 volume glycerol, and the current density was 20-60 mA / cm 2 , hydrogen charging time is 6-12h, followed by annealing at 150-200℃ for 1-2h to uniform hydride distribution.

[0056] The target material of the DC magnetron sputtering instrument is pure silver (purity ≥ 99.99%), and the vacuum degree of the sputtering chamber is maintained at 1×10 -3 Below Pa.

[0057] The displacement resolution of the in-situ stretching stage is ≤10nm, and the accuracy of the force sensor is ≤0.1mN, which supports high-precision deformation control in the scanning electron microscope.

[0058] A dedicated system for implementing the above-described method is characterized by comprising: a. a low-temperature speckle pattern preparation module: comprising a DC magnetron sputtering apparatus (current 0-100 mA) and a constant-temperature water bath immersion tank (temperature control accuracy ±1°C); b. a multimodal imaging module: comprising an integrated environmental scanning electron microscope (equipped with an EBSD detector and an in-situ stretching stage) and HR-DIC image acquisition software (supporting automatic array scanning); c. a data coupling analysis module: comprising an ImageJ image stitching plug-in, OIM data analysis software, and an independently developed HR-DIC-EBSD registration algorithm library.

[0059] Among them, the present invention has achieved a breakthrough in speckle preparation technology: for the first time, nanoscale speckle preparation was achieved at room temperature, solving the problem of hydride temperature sensitivity. The speckle resolution reached 40nm, meeting the requirements of phase interface deformation analysis.

[0060] The present invention uses EBSD calibration efficiency to improve: the spherical index algorithm increases the calibration rate of small-sized hydrides from 65% to 92%, and truly restores the crystal structure;

[0061] The present invention realizes cross-scale coupling analysis: achieving precise alignment of 8nm strain resolution and 200nm orientation resolution, revealing the quantitative relationship between hydride orientation and strain localization, and providing key data for the study of hydrogen embrittlement mechanism.

[0062] The silver film speckle preparation process, spherical index calibration method and multimodal coupling system adopted in the present invention are disclosed for the first time, which are different from traditional gold film speckle and rectangular index technologies; the present invention proposes a systematic solution to the temperature sensitivity and small-size calibration problems of hydrides, significantly improving the analysis accuracy; the present invention has been verified by actual samples and can be directly applied to the study of the hydrogen embrittlement mechanism of titanium alloys, with clear engineering application value.

[0063] Example 2

[0064] refer to Figure 1 , which is different from Example 1 in that: This example provides a case for optimizing the parameters for preparing silver film speckle patterns:

[0065] Experimental design: The effects of different NaCl concentrations and immersion times on speckle quality were compared. The evaluation indicators were speckle contrast (C) and size uniformity (σ).

[0066] Condition A: 1g / L NaCl immersion for 1h, silver layer thickness 3nm

[0067] Condition B: 2g / L NaCl immersion for 2h, silver layer thickness 4nm (preferred parameters for claims)

[0068] Condition C: 3g / L NaCl immersion for 3h, silver layer thickness 5nm

[0069] Test results:

[0070]

[0071]

[0072] Conclusion: When the sample is immersed in 2g / L NaCl for 2h and the silver layer is 4nm, the speckle size is uniform and the contrast is the highest, which meets the requirements of HR-DIC nanoscale strain analysis.

[0073] Example 3: Coupled analysis reveals the effect of hydride orientation on deformation

[0074] Sample conditions: TA16 alloy with a hydrogen content of 200 μg / g, containing two oriented hydrides:

[0075] Type A: Intracrystalline hydride, orientation <10-10>

[0076] Type B: intergranular hydride, orientation <11-23>

[0077] HR-DIC strain analysis:

[0078] Within 50nm around TypeA, the cylindrical slip strain ε<10-10> is 0.08, which is 40% higher than that of the matrix;

[0079] Near the Type B interface, the shear strain γxy reaches 0.12, which is significantly higher than that of Type A (0.06), indicating that intercrystalline hydrides are more likely to induce localized interface slip.

[0080] EBSD verification: The average orientation difference between Type B and the matrix is ​​22°, which is greater than the 10° of Type A, which conforms to the rule that "the larger the orientation difference, the more significant the strain concentration".

[0081] Example 4: Comparison of deformation behavior of hydrides of different titanium alloy materials

[0082] Experimental design: Two typical titanium alloys, TA16 and TA15, were selected and subjected to the same electrochemical hydrogen charging process (electrolyte: 1 / 3 volume phosphoric acid + 2 / 3 volume glycerol, current density 40 mA / cm 2 , hydrogen charging time 10h, annealing at 180℃ for 1.5h) to prepare hydride-containing samples and compare the deformation behavior differences of hydrides in different matrices. Test process:

[0083] Speckle pattern and data acquisition: The silver film speckle pattern preparation process described in the claims (silver layer thickness 4nm, soaked in 2g / L NaCl solution for 2h) and HR-DIC and EBSD acquisition parameters were used;

[0084] In-situ tensile test: 1×10 -4 The loading was performed at a strain rate of / s, and the image data were collected after pausing when the macroscopic strain reached 0.3%, 0.6%, and 0.9%;

[0085] Data Analysis:

[0086] HR-DIC results show that the cylindrical slip strain concentration factor K around the intragranular hydride (<10-10> orientation) in the TA16 alloy is 1.8, while the K value of the same hydride in the TA15 alloy is only 1.3, indicating that the TA16 matrix has a stronger constraint on the deformation of the hydride.

[0087] EBSD analysis shows that the average orientation difference between the intergranular hydride and the matrix in the TA15 alloy (28°) is greater than that in the TA16 alloy (22°), resulting in a significantly higher peak shear strain γxy at the interface in the former (0.15) than in the latter (0.12). Conclusion: This method can effectively distinguish the deformation behaviors of hydrides in different titanium alloys, providing microscopic data support for material selection.

[0088] Example 5: Study on the deformation behavior of hydrides under multiple stress states

[0089] Experimental Design: Uniaxial tension, equibiaxial tension, and plane strain compression tests were performed on TA16 specimens containing hydrides to explore the effect of stress state on the deformation of hydrides. Experimental steps:

[0090] Sample preparation and speckle processing: Prepare silver film speckle in the same manner as in Example 1;

[0091] Loading and data collection:

[0092] Uniaxial tension: strain rate 1×10 -4 / s, collecting data in the strain range of 0.2%-1.0%;

[0093] Equibiaxial stretching: achieved through a biaxial stretching station, with a biaxial stress ratio of 1:1, and collecting data in the 0.1%-0.6% strain range;

[0094] Plane strain compression: Using a constrained die, collect data in the 0.3%-0.8% strain range;

[0095] Coupling analysis:

[0096] Under uniaxial tension, the intercrystalline hydride interface is prone to generate opening cracks along the tensile direction, and the strain concentration factor K_I = 2.1;

[0097] During equibiaxial stretching, hydrides are more susceptible to shear deformation, with the peak of shear strain γxy appearing at the 45° oblique section, and K_II = 1.9;

[0098] During plane strain compression, twins appear within the hydride, and the strain concentration factor near the twin boundary, K_tw, is 1.7. Conclusion: This method can accurately quantify the deformation characteristics of hydrides under different stress states, providing a theoretical basis for material design under complex stress conditions.

[0099] Example 6: Effect of Environmental Factors on Hydride Deformation Behavior

[0100] Experimental design: Two sets of comparative experiments were set up to study the effects of temperature and humidity on hydride deformation.

[0101] Experimental groups:

[0102] High temperature group: In-situ stretching of the hydride-containing sample was performed at 150°C, with other parameters being the same as those in Example 1;

[0103] High humidity group: In-situ stretching was performed in a humidity environment of 90%; Key results:

[0104] High temperature group: The temperature increase increases the difference in thermal expansion coefficient between the hydride and the matrix, generating additional thermal stress at the phase interface, resulting in a 25% increase in the strain concentration factor K compared to room temperature;

[0105] High humidity group: Water molecule adsorption accelerates the diffusion of hydrogen atoms, the strain field fluctuation around the hydride intensifies, and the number of secondary crack initiation under the same strain increases by 40% compared with the dry environment;

[0106] EBSD-assisted analysis revealed that high temperatures caused a 1-3° shift in hydride crystal orientation, and that the intergranular hydride content increased by 12% under high humidity. Conclusion: This method, combined with environmental control equipment, can be used to study the effects of complex service environments on hydride deformation, expanding the research boundaries of material micromechanical behavior.

[0107] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for studying the deformation behavior of titanium alloy hydride, characterized in that: The following steps are involved: a. Low-temperature speckle pattern preparation: Silver film speckle patterns were prepared on the surface of titanium alloy hydride samples by using DC magnetron sputtering to deposit a 3-5 nm thick silver layer at room temperature. The sample was then immersed in a 1-2 g / L NaCl solution for 1-3 hours to form nanoscale speckles with an average size of 40-60 nm. b. HR-DIC image acquisition: An environmental scanning electron microscope (ESEM) was used to acquire image arrays before and after deformation. Operating parameters were: accelerating voltage 5-10 kV, beam current 0.1-0.3 nA, working distance 5-8 mm, dwell time 1-3 ms, and an annular backscattered electron detector. Image arrays ranging from 9 × 9 to 15 × 15 were acquired with 10%-20% overlap. Single image resolution was ≥3072 × 2048, with a pixel size ≤10 nm. c. EBSD crystallographic characterization: Before speckle pattern preparation, EBSD scanning was performed on the target area. The raw data was processed using the spherical indexing algorithm. The scanning parameters were: accelerating voltage 15-25 kV, beam current 20-30 nA, step size 100-300 nm. The hydride phase distribution map and crystallographic orientation data were output using OIM analysis software. d. Multi-data coupling analysis: The local strain field (εxx, εyy, γxy) calculated by HR-DIC is spatially aligned with the EBSD phase distribution and crystallographic orientation data to establish a quantitative correlation model between hydride morphology, orientation and local deformation.

2. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: The silver film deposition current in step a is 30-50 mA, the sputtering time is 5-10 min, and the uniformity error of the silver layer is ensured to be less than 5%.

3. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: The image stitching in step b was performed using the Grid / CollectionStitching plug-in of ImageJ software, and the edges of the stitched images were cropped to retain an effective analysis area ≥ 100 μm × 100 μm.

4. The method for studying deformation behavior of titanium alloy hydride according to claim 3, characterized in that: The spherical index algorithm in step c is implemented by the following steps: Perform Gaussian blur preprocessing on the original Kikuchi strip image; A three-dimensional spherical coordinate system is used for crystal orientation search, and the search angle range is ±15°; The minimum confidence threshold is set to 0.15, and low-quality calibration data are rejected without subsequent cleanup processing.

5. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: The spatial registration error in step d is ≤ 2 pixels, and coordinate calibration is achieved by marking tungsten wire positioning points with a diameter of 5-10 μm on the sample surface.

6. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: It also includes a deformation loading step: an in-situ stretching stage is used to load the scanning electron microscope, the strain rate is controlled at 1×10-4-1×10-3 / s, and the loading is paused and the image is collected every time the macro strain increases by 0.2%-0.5%.

7. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: The hydride sample was prepared by electrochemical hydrogenation, the electrolyte was 1 / 3 volume phosphoric acid + 2 / 3 volume glycerol, and the current density was 20-60 mA / cm 2 , hydrogen charging time is 6-12h, followed by annealing at 150-200℃ for 1-2h to uniform hydride distribution.

8. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: The target material of the DC magnetron sputtering device is pure silver, and the vacuum degree of the sputtering chamber is maintained below 1×10-3Pa.

9. The method for studying deformation behavior of titanium alloy hydride according to claim 1, characterized in that: The displacement resolution of the in-situ stretching stage is ≤10nm, and the force sensor accuracy is ≤0.1mN, which supports high-precision deformation control in the scanning electron microscope.

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